Wrench.



JOSEPH HARTIGAN, OF MOUNT PLEASANT, OF ONE-FOURTH TO J. P. KELLER, OF

VAN IA.

PENNSYLVANIA, ASSIGNOR MOUNT PLEASANT, PENNSYL- WRENCH- Specification ofLetters Patent.

Patented Oct. 30, 1906.

Application filed January 26, 1906. Serial Ila 298,061.

T0 aZZ whom it may concern.-

Be it known that I, JosEPH-HARTIGAN, a citizen of the United States,residing at Mount Pleasant, in the county of Westmoreland and State ofPennsylvania, have invented new and useful Improvements in Wrenches, ofwhich the following is a specification.

This invention relates pipe-wrenches.

The object of the improvement is to provide a readily-removable jawprovided on one face with a series of teeth so arranged as to enable anoperator to changethe direction of rotation of the pipe by simplyreversing the position of the jaw.

Other objects and advantages will be hereinafter referred to andparticularly pointed out in the claims.

In the drawings, Figure 1 is a perspective view of my improved wrench.Fig. 2 is an elevation of the same, the parts being positioned to turn apipe toward the left. Fig. 3 is a similar view, the jaw being reversedto turn a pipe toward the right.

The numeral 1 represents a curved jaw provided with a series of teeth 2on its conto improvements in vex-edge and formed with an opening 3 and ahandle 4. A hook-shaped cooperating jaw 5 is pivoted to jaw 1 by adetachable pin 6, passing through jaw 5 and opening 3. Jaw 5 isbifurcated at its lower portion to receive jaw 1, and its inner concavedsurface is pro vided with a series of serrationsor teeth 7.

When it is desired to turn a pipe toward the left, as shown in Fig. 2,pipe 8 is caught between the teeth 7 of the inner concavededge of jaw 5at the outer hooked end 5 and the upper tooth conveXed edge of jaw 1.When the handle 4 is turned in direction of arrow a, the teeth 2 crowdpipe against teeth 7, where. it is gripped. Consequently the greater thepressure applied to the handle the firmer the pipe is held. The firmgrip of the pipe by the jaws insures of the pipe being turned.

It frequently happens that the movement of a pipe is to be reversed, andto conveniently and readily accomplish such a movement is the primeobject of this invention. To reverse the .movement, pin 6 is removed andjaw 1 is reversed and the pin replaced, as shown in Fig. 3, jaw 5remaining on the pipe while the change of parts is made. The pipe is nowgripped between the teeth 7 and the teeth 2; but by the peculiarrelationship the curves of the teeth have with each other and whenpressure is applied to handle 4, as shown by arrow b, Fig. 3, the pipeis engaged at diametrically opposite points and is accordin 1y turned ina direction opposite to that w% in Fig. 2.

The fact that I utilize but one set of teeth on the face of jaw l tocooperate with the teeth of jaw 2 to turn a pipe toward the right orleft makes it essential that the parts be so arranged as will permit thejaws to pass each other. Hence I bifurcate aw 5, and aw 1 o eratesfreely between the sides thereof.

his construction serves'the very important function of enabling me tohandle a much larger pipe than could otherwise be handled.

Furthermore, the pipe is gripped on one side by two series of teeth 7,the teeth'2 forming an intermediate gripping medium.

Having thus described my invention, what I claim is 1. A wrenchcomprising a curved jaw formed on its inner surface with teeth, areversible lever member formed with teeth on one surface only, saidteeth ofthe lever member being adapted to cooperate with the teeth ofthe jaw in either osition, the reversing of the lever member 0 angingthe direction of movement of the article being operated upon.

2. A wrench comprising a hook-shaped jaw formed on its inner surfacewith teeth, a reversible lever member formed with teeth on one surfaceonly, said teeth of the lever member being adapted to cooperate with thej aw-teeth near the middle thereof when said lever member is in oneposition, and with the teeth near the free hooked end of the jaw when ina reverse position.

3. A wrench comprising a jaw formed with a pipe-gripping edge, alever-jaw arranged for movable and reversible connection with saidpipe-gripping jaw, said lever-jaw being formed with a singlepipe-gripping edge to cooperate with the pipeipping edge of the jaw ineither position of t e lever-j aw.

In testimony whereof I have aflixed my signature in presence of twosubscribing witnesses.

JOSEPH HARTIGAN.

Witnesses:

M. A. KING, SAMUEL NEEL.

en the parts are assembled, as shown

